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Panoramic-PIV system and its application to tandem oil fences
Hyun,B.S.,Hong,S.D.,Bang,K.H.,Saga,T.,Doh,D.H.,Baek,T.S.,Kobayashi,T. 韓國海洋大學校 附設 海洋科學技術硏究所 1999 硏究論文集 Vol.8 No.-
Abstract a Panoramic PIV system is developed using three commercial CCD cameras of which pixel resolution is 768 x 494. An image composition process is made to make Panoramic images obtained by the respective CCD camera. The velocity vectors are obtained by the grey level cross-correlation method. An experimental investigation into the vortex-to-vortex interaction of the flow between two fences set in tandem is made by using the constructed Panoramic PIV system. Further, the velocity spectra of the oscillating flow behind the downstream oil fence are also obtained to predict the characteristics of the tip vortex shedding. the system is applicable to a wide range of measurement in which high spatial resolution is required.
″Drifting Cups on a Meandering Stream″ in Japan
Nakayama, Yasuki,Aoki, K.,Oki, M.,Kobayashi, T.,Saga, T.,Maruoka, H.,Kato, S. The Korean Society of Mechanical Engineers 2001 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.15 No.12
Drifting Cups on a Meandering Stream (Kyokusui-no-En) is a Poetry Party that had its origin In ancient China, and was introduced to Japan passing through Korea. The flow of the meandering stream was made clear using the flow visualization techniques, surface floating method, PTV and the numerical simulation. At the same time, the motions of floating cup, the floating speed, relating speed and the trajectory of the cup were also analysed by using an originally developed image processing technique. Based on these researches, the model channel was considered. To make this party interesting the channel must has the characteristic that the drifting cups take the random pass and stagnant at the unexpected place. This model channel is satisfied with these conditions and the fluid mechanics consideration is performed on the both points of the experimental visualization and numerical simulation.